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WILLIAM R. D. HALL, NABBERTH, PENNSYLVANIA.

PROCESS FOR TREATING ARTIFICIAL-SILK WASTE F018, SPINNING- INTO YARN.

No Drawing.

To all whom it may concern:

Be it known that 1, WILLIAM R. D. HALL, a citizen of the United States, residingat Narbcrth, in the county of Montgomery and State of Pennsylvania, have invented new and useful Improvements in Processes for Treating Artificial-Silk Waste for Spinning into Yarn, of which the following is a specification.

This invention aims to produce a process by which artificial silk waste may be treated so as to satisfactorily spin the same into yarn.

I have found that when the moisture content of the silk waste is above 8 per cent. the absorption 'in artificial silk waste is most complete and causes the material to become too weak, resulting in a short staple.

On the other hand, when the moisture content is below 6 per cent. the material becomes too brittle to be worked, 2'. 6., when the same is to be turned into yarn the waste breaks and is consequently not of suliicient length to produce a yarn of uniform smoothness and firmness, resulting in the same disadvantage caused when the moisture content of the waste is below 6 per ceht.

It will thus be seen that it is very diflicult to produce a yarn from silk waste, of, the artificial kind of uniform quality and smoothness as it will be readily appreciated that it is almost impossible to keep, the moisture content between 6 and 8 per cent. in

such waste, and I have therefore conceived the following idea whereby the constant.

moisture content of between 6 and 8 per cent. in artificial silk waste. which is about to be made up into yarn is insured.

An ir-tight room is provided in which the artificial silk waste is placed, which room has a moisture content of the desired quality, 71. e., from 6 to 8 per cent. Consequently, the waste absorbs the needed moisture content or evaporates any extra moisture which it may contain and after remaining in this room for a certain time, the same is in a conilition to be worked.

However, it will be readily appreciated that in such a fine fiber as that of artificial silk the moisture content wouldloe varied no matter how quickly the waste might be removed from the conditioning room to the machine. In order to guard against this. and to keep the moisture content of the waste Specification of Letters Patent.

Patented May is. ieic.

Application filed June 26. 1918. Serial No. 242.110.

.tions to the working of artificial silk waste into yarn or other purposes.

Having described my invention, what I claim is 1. The process of conditioning artificial silk waste so that it may have its proper moisture content, which consists in placing the same in a conditioning room having its atmosphere charged with the proper moisture content and in then allowing the artificial silk wasteto remain in such room until it has either aibsorbed or evaporated suflicient moisture to have the correct moisture content, and prior to its removal from such room in treating the silk waste with a substance whereby to prevent the loss or absorption of moisture from the anoutside of such room.

2. The process of conditioning artificial silkwaste so that it may have its proper moisture content, which consists in placing the same in a conditioning room having its atmosphere charged with the proper moisture content and in then allowing the artificial silk waste to remain in such room until it has either absorbed or evaporated sufficient moisture to have the correct moisture content, and in treating such silk waste with an animal oil to prevent its losing or absorbing any moisture subsequent to its re moval from such room. 1

3. The process of conditioning artificial silk waste so that it may have its proper moisture content, which consists in placing the same in a conditioning room having its atmosphere charged with the proper moisture content and in then allonling the artificial silk waste to remain in siich room until it has either absorbed or evaporated sufiicient moisture to have the correct moisture content, in; applying to such silk waste lard oil, previous to its removal from such room whereby the absorption or evaporation of =moisti'ire from such silk waste is prevented after its removal from such room.

4. The process of conditioning artificial silk waste so that it may have its proper moisture content, which consists in placing the same in a conditioning room having its atmosphere charged with the proper moisture content and in then allowing the artificial silk Waste to remain in such room until it has either absorbed or evaporated Suflicient moisture to have the correct moisture content, and in applying to such silk Waste lard oil in the proportion of 6? per cent. previous to its removal from such room whereby the absorption or evaporation of 10 moisture from such silk Waste is prevented after its removal from such room.

WILLIAM R. D. HALL. 

